what makes my transmision shift fine through first,second and third then when it shifts to overdrive it just revs up and slips

what makes my transmision shift fine through first,second and third then when it shifts to overdrive it just revs up and slips 1 Answer

I have a 1996 suburban with an issue that need help with. My truck idle find revs up find only when you put it in gear and want to go it wants to die you let off the paddle and it fin you step on the gas want to chock it has no power. I have cleaned out throttle, change throttle position sensor, Map sensor and it runs the same. I'm not reading any codes no check engine light or nothing. what could it be. clog cat, bad fuel pamp? 11 Answers

I have a 1996 suburban with an issue that need help with. My truck idle find revs up find only when you put it in gear and want to go it wants to die you let off the paddle and it fin you step on th...

I have a 1999 Chevy Surburban with a 5.7l engine and, I believe a 4 speed tranny with over drive, don't know for sure. It has 148,300 mi on it. Tranny shifts hard going from second to third. 1 Answer

Shifts very hard and a slight slip from second to third. Other wise shifts good in rest of gears. Checked fluid level, checked full.

I'm driving with my AC on all is fine then it randomly turns to the heater. If I stop and turn the car on and off it fixes for a while then randomly goes back to heat. Why? 3 Answers

I am driving with my AC on all is fine then randomly it turns to the heater. If I stop and turn the engine on and off it goes back to AC. Why does this happen? My mechanic tells me I was low on Fri...

I have a 2001 suburban. My a/c was working fine and then it gave out. It started blowing hot air. We tried switching the ECM B 20a fuse but when i turn on the a/c it keeps blowing it. Idk what to do 2 Answers

I need to know what can i do or what can i chexk